CHAPTER IX 



INSECTS INJURIOUS TO CARROT, CELERY, PARSNIP 

 AND RELATED CROPS 



As a rule, these ])lants are relatively free from insect attack, 

 but the carrot rust-fly, recently introduced from P^urope and 

 now gradually spreading over Canada and the northern states, 

 promises to become a serious pest. 



The Carrot Rust-Fly 



Psila rosw P^'abricius 



The carrot rust-fly is a native of Europe, where it has been 

 known since 1794. It was introduced into Canada })robal)ly 

 in the early eighties, but 

 first attracted attention 

 at Ottawa in 1885. It 

 soon became al)undant 

 in Quebec, New Bruns- 

 wick and Nova Scotia. 

 In New York it was 

 flrst observed in Fulton 

 County in 1901 . It now 

 occurs in the northern 

 states from Maine to 

 Michigan. Itisaserious """■ ">'•- Tl- -nno,, n,,t-fly (x 7J). 



enemy of carrots and celery and also attacks parsnips, parsley, 

 celeriac and wild carrot. 



181 



